Nit fix (#191)

src/seamless_communication/cli/m4t/finetune/finetune.py

@@ -146,9 +146,9 @@ def main() -> None:
         args.model_name, device=finetune_params.device, dtype=torch.float16
     )
     logger.info(f"Model {model}")
-    assert model.pad_idx == text_tokenizer.vocab_info.pad_idx
+    assert model.target_vocab_info == text_tokenizer.vocab_info
     assert model.t2u_model is not None
-    assert model.t2u_model.pad_idx == unit_tokenizer.vocab_info.pad_idx
+    assert model.t2u_model.target_vocab_info == unit_tokenizer.vocab_info
 
     train_dataloader = dataloader.UnitYDataLoader(
         text_tokenizer=text_tokenizer,